My permissions should be OK.
I cross-checked it referring to this tutorial.
Backend URL doesn’t produce a 404 error so this also should be good. I’ll try to reinstall it again but I did it probably 5 times with the same results. I’m definitely doing something wrong.
Refer you to 2fa I didn’t get there yet.
Please throw any findings into this post. Even your scribbles. Once you publish a proper ‘How to install M2.4 tutorial’ and more importantly ‘How to upgrade M2.3 to 2.4’ We’ll remove the post. It could be for impatient people like myself.